why do you call me Good...

There is no human attribute that is so good that it cannot be turned to wickedness by the unrestrained, egocentric self. Because self is only interested in the unlimited glorification of itself it can pervert anything. Satan fell because he sought his own glorification and not God's glory.
Satan forgot that all the assets he had came from God. The devil is God's object lesson about the power to do evil that resides in the part of our self that wants to be the god of its own life. This is the self that has submitted to the moral and spiritual leadership of Satan in the flesh.

Rich